That's what they said. "Thank you so much. This is so nice."
Talk-show hosts and other comedians should forgo the stupid casino jokes. They're so predictable that we can write some fill-in-the-blank formulas for them:
"Indians [verb phrase] [some honor, celebration, or holiday]. The Indians celebrated by going to their casino."
"Indians [verb phrase] [anything to do with money]. The Indians spent their money at [or on] a casino."
For instance: "Did you hear this? An American Indian won the Nobel Prize in medicine for inventing a cure for cancer. Yup. That's great. Unfortunately, he lost it on a busted flush in his casino." Ha ha ha ha ha!
For more on the subject, see "Indian Giver" Joke on Tonight Show and Leno: Mobsters Run Foxwoods.